Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of humic urea

A humic acid urea, humic acid technology, applied in urea compound fertilizer, organic fertilizer, nitrogen fertilizer and other directions, can solve the problems of incomplete complexation between urea and humic acid, increased transportation and packaging cost of urea, and small industrial production capacity, etc. Achieve the effect of improving the utilization rate of urea, storage resistance, and sufficient complexation

Inactive Publication Date: 2009-05-06
亓欣
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that it is difficult to mass-produce
[0014] The common defects of the above-mentioned processes are: first, the complexation between urea and humic acid is incomplete, and the relative proportion of humic urea formed is relatively small.
Second, the industrial production capacity is too small
The third is to produce in places other than the urea plant, resulting in increased transportation, loading and unloading and urea packaging costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In the production process of ordinary urea (that is, small particle urea), when the urea solution is evaporated and concentrated to 99.7%, the temperature is controlled at about 140°C, and the urea is in a molten state, and the urea is crushed to 100 meshes. 18 parts of coal humic acid, calcium and magnesium 5 parts of phosphate fertilizer binder are evenly added to 77 parts of urea solution, and after being fully mixed, they are made into finished products through liquid nozzle granulation, high tower granulation and drying processes, and are packaged before leaving the factory.

Embodiment 2

[0029] In the ordinary urea production process, when the urea solution is evaporated and concentrated to 99.7%, the temperature is controlled at about 140°C and the urea is in a molten state, and 26 parts of coal humic acid (including 16 parts of weathered coal, humic acid 10 parts of zinc), 8 parts of adhesive (including 6 parts of calcium magnesium phosphate fertilizer, and 2 parts of bentonite), were evenly added to 66 parts of urea solution, and after mixing, they were prepared by liquid nozzle granulation, disc granulation, and drying process. Finished products, packaged and shipped. The final product of this embodiment is zinc-containing humic acid urea, which is suitable for the application of gramineous grain crops and zinc-loving crops.

Embodiment 3

[0031] In the ordinary urea production process, when the urine is evaporated and concentrated to 99.7%, when the molten urea solution passes through the granulation nozzle, 15 parts of coal humic acid and 5 parts of calcium magnesium phosphate fertilizer binder are proportionally sprayed with a blower device. In the form of mist, it is evenly sprayed into the granulation tower and mixed with 80 parts of molten urea, and then it is made into a finished product through high-tower granulation and drying processes, and it is packaged before leaving the factory.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses preparation process of humic urea, and features that during synthesizing urea, humic acid and adhesive are added directly to produce humic urea. The materials include humic acid in 5-300 weight portions, adhesive in 1-50 weight portions, and 70.0-99.7 % concentration urea solution in 60-300 weight portions. The preparation process includes mixing the materials, pelletizing in nozzle, solid pelletizing, drying and other steps. The preparation process has full complexing between humic aid and urea, and is simple, low in cost and suitable for industrial production, and the humic urea product has less moisture absorption, high strength, long storage life and raised urea utilizing rate.

Description

technical field [0001] The invention relates to a preparation method of humic acid urea. Background technique [0002] In order to improve the utilization rate of nitrogen fertilizer, especially the utilization rate of urea, which is the most used, many scientists in the world have carried out a lot of exploration. Since the 1960s, people at home and abroad have been engaged in the research of urea synergism. There are roughly three ways: the first is the additive method, that is, adding urease activity inhibitors or nitrifying bacteria activity inhibitors to the urea melt. . So far, more than 70 kinds of urease inhibitors and more than 100 kinds of nitrifying bacteria inhibitors have been tested; the second is the coating (coating) method, and its coating materials include sulfur, resin, plastic, asphalt, phosphate, etc.; The first is the polycondensation method, which is mainly to condense urea-formaldehyde into insoluble macromolecules, such as isobutylidene diurea. my...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C05G1/00C05F11/02C05C9/00
Inventor 亓欣程礼华
Owner 亓欣